The bottom shutter on my Coolpix S9400 doesn't fully close when the camera turns off. Also, there's a dark spot in the bottom-left corner of every image. It's visible on the preview screen too, so I think it's a problem with the lens. I uploaded some photos to my computer, and the dark spot was still there, so it's not an issue with the preview screen. Probably not related to the broken shutter, as it opens fully when the camera turns on. Anyone have a fix for either of these problems?